Rotary reducing machine



Feb.25, 1936. w, J ARMSTRONG 2,031,683

ROTARY REDUCING MACHINE Filed Jan. 9, 1932 2 Sheets-Sheet 1 l2\ 7o v /AY/ A l 25 2| 2e 23 43 35 40 Q 32 o a O 3o 33 28 47 a 2=z um l3 7 0 Il a"! o 0 b A 46 //v VENTOR k WaH'er J. Arms fr-0n A BY Feb. 25, 1936. w. J. ARMSTRONG ROTARY REDUCING MACHINE 2 Sheets-Sheei 2 Filed Jan. 9, 1932 Fi 6 [:7 7 ZW/ENTOR y y Wa/7er J. firms from Patented Feb. 25, 1936 2,031,683 ROTARY REDUCING MACHINE Walter J. Armstrong, Columbus, Ohio, assignor to The J eifrey Manufacturing Company, a corporation of Ohio Application January 9, 1932, Serial No. 585,789

11 Claims.

The present invention relates to rotary reducing machines, such as crushers, pulverizers, shredders, and the like, and has to do particularly with means for intercepting and receiving from the sphere of action of the rotor unpulverable fragments mixed with the fed material.

Objects of the invention are to provide such means as'may be readily and cheaply constructed and as will be most effective in operation and, also, as may be disposed in an inoperative position permitting access to the interior of the machine.

The devices of the invention may be applied to machines of standard construction, whether of rigid or swing hammer design, either during original manufacture or as a later added improvement. In the latter case, only slight modification of the machine casing is required. The relative arrangement of the essential elements and the principle of. operation, as regards the material segregating feature, are substantially the same as disclosed in my prior U. S. Patent No. 1,751,611, dated March 25, 1930, the present invention constituting an improvement in constructional features.

In the accompanying drawings, I have shown a practical machine as illustrative, merely, of the invention, and I shall proceed with a description in detail thereof. In the drawings:

Figure 1 is a side elevation of a machine embodying the invention.

Figure 2 is a vertical sectional view of the machine of Figure 1.

Figure 3 is a portion of the view of Figure 2 on an enlarged scale.

Figure 4 is a view similar to that of Figure 3, but with parts removed and others in different position.

Figure 5 is asection on line 5-5 of Figure 3, and

Figures 6 to 10 show details.

Referring now to the drawings, reference numeral I I designates generally a substantially rectangular, vertically open base frame upon which is supported an upper housing generally designated at I2. In bearings suitably mounted in connection with the members just mentioned is journaled a horizontal shaft I3 to which is secured a rotor I4 which, as here shown, includes swing hammers I5, the direction of rotor rotation being indicated by the arrow, Figure 2. Bars I6 define a substantially semi-circular screen cage beneath the rotor and in operative relation to the hammers, the terminal bars I1 and I8 being relatively heavy and of substantially rectangular cross-section.

The casing I2 presents a breaker plate I9, and defines a feed opening 20 above the rotor, a hopper wall being constituted by a sloped throat plate 2I.

The description thus far covers general structure well known in the art and disclosed, for example, in reissue Patent 17,334, William K. Liggett, dated June 25, 1929. The appurtenances to be described hereinafter and constituting the present invention per se and in combination with the main machine, may be readily applied to existing machines of the Liggett type, as will be apparent.

The spaces between the casing and frame side walls are occupied by bolt attachment segment plates 22 and 23, the inner edges of the latter being sloped as the throat plate 2|. Disposed above the discharge end of the reducing zone constituted between the rotor and the screen bars, is an abutment or bafile plate 24, the inner end of the abutment being just outside of the beater paths, the abutment having a lower curved defiecting surface whose inner portion is substantially radial to the rotor and whose outer portion is substantially on the horizontal. The abutment is secured through suitable means to' the throat plate 2I and to a top plate 25 which is secured across the top edges of plates 22 and 23 and extends downwardly for a distance at 25'. A wear plate 26 is secured to the undersurface of plate 25 in continuation of abutment 24.

A horizontal hinge rod 21 is journaled at its ends in apertures formed in the side plates 22 and 23, the rod being disposed slightly above and outwardly of cross-bar I8. A deflection plate 28 has cars 29 provided with apertures in which rod 21 is engaged, the rod thus being oifset from the plate in such a manner that the latter is adapted to assume an upright position in which it is inherently stable with its lower edge resting on and supported by bar I8. The deflecting surface of plate 28 comprises a lower portion slightly sloped upwardly and away from the rotor and a top portion somewhat more abruptly inclined. The top of plate 28 is spaced a suitable distance from the deflecting surface of abutment 24 when plate '28 is in the upright position described, this being its operative position.

Ears 30 formed on the rear side of plate 28 at about the juncture of its two angular portions support a horizontal hinge rod 3| which also engages in ears 32 of a plate 33. With plate 28 in upright position plate 33 is adapted to assume the substantially horizontal position shown in Figures 2 and 3, the end of the plate 33 remote from plate 28 being supported on a rod 34 engaged in outwardly open horizontal grooves, as at 35, presented by the side plates 22 and 23. Rod 34, as particularly shown in Figure 10, is provided with a pair of handles 34' and 34 which may be grasped when positioning the rod or demounting it for the purpose to be described. I

An end plate 36 is adapted to be disposed across the vertical edges of plates 22 and 23 beneath cover portion 25', the lower edge of plate 36 rest ing at its ends on lugs as at 31 provided on side plates 22 and 23. The upper outer marginof plate 36 has a sealing strip 38 secured thereto, this strip being engageable by clamps as at 39, see also Figures 6 and 7. The ends of plate 36 are similarly engageable by clamps as at 40, these latter being pivotal about pins mounted in laterally projecting ears formed on plates 22 and 23. A sealing strip 4| fixed to the lower inner margin of the plate portion 25 cooperates with the top inner margin of plate 36. Along its lower 'lnner margin plate 36 has secured thereto an angle strip 42 which is adapted to take over the adjacent up-turned edge of plate 33, the opposite edge of plate 33 overlying a ledge 43 formed on 'plate 28 and the other edges of plate 33 underlying ribs as at 44 formed on the inner sides of plates 22 and 23. Due to these provisions plate 33 in the position shown in Figures 2 and 3 constitutes a shelf whose edges are. in substantially sealed relation with the surrounding wall members.

Swinging movement of plate 28 toward the rotor is normally limited through engagement of the lower edge of the plate with bar l8, as above mentioned, and also through engagement of its upper portion with lugs as at 45 formed on the liner plates on the inner sides of plates 22 and 23, the lugs 45 serving alone upon displacement of bar 18. In the position of parts shown in Figures 2 and 3, shelf 33 serves as a compression member engaged between plates 28 and 36 to prevent the swinging of plate 28 away from the rotor. The chamber existing below shelf 33 is closed outwardly by means of a plate 46 extending across the lower outer edges of plates 22 and 23 and secured thereto by means of clamps as at 41.

Withthe parts in the position as above described, abutment 24, which is positioned immediately in advance of the feed opening, is adapted to deflect into the pocket or trap whose bottom wall is constituted by shelf 33 unpulverable objects carried around the rotor and tangentially protected by the beaters against the abutment. Other fragments will glance off of the deflecting surfaces of plate'28 to be directed against abutment 24 or wear plate 26 and to fall therefrom onto shelf 33. The upper portion of plate 28 is outwardly inclined at such an angle as not to impede the access of fragments to the pocket, and this portion also constitutes a wall portion for the pocket, extending as it does above shelf 33.

For the purpose of cleaning out the pocket plate 46 may be removed by means of the handles 50 and St, the clamps 41' being loosened. Subsequent removal of the rod 34 outwardly of the grooves 35 permits shelf 33 to drop thereby emptying the pocket. In the above operation,

' plate 28 ordinarily remains upright, although it may be pulled downwardly to the position shown in Figure 4. If full access to the rotor is required,

clamps 39 are loosened and plate 36 removed by means of the handles 48 and 49. Then plate 28 can be swung outwardly, if this has not already been done, so that the two elements 28 and 33 occupy the collapsed position shown in Fig. 4 wherein they project through the space formerly closed by plate 46. In large size machines, the opening thus afforded is sufficiently large for a man to get in the back of the machine and still leave room for conveniently laying replacement parts and tools on the substantially fiat shelf constituted by plate 28.

From the above, it will be seen that while I have provided efliciently placed segregating means for unpulverable objects, these means may be instantly demounted or collapsed so as to give access to the machine interior. While I have shown and described a specific arrangement of parts, it will be "understood that the invention is not limited to the details of this disclosure, the

scopeof the invention being determined in the following claims.

I claim:

1. In a reducing machine, a rotor, and means for removing unpulverable fragments from the sphere of action of the rotor and receiving'such fragments, said means comprising an upright deflection plate extending longitudinally of the rotor and having a hinging axis at its lower portion parallel to the rotor axis to one side. of the vertical plane of the latter, said plate being swingable about said axis away from the rotor to expose the latter, -and a substantially horizontal displaceable shelf on the side of the plate remote from the rotor axis and having a supporting engagement with said plate.

2. Ina-reducing machine, a rotor, and means "for removing unpulverable fragments from the sphere of'action of the rotor and receiving such fragmenta'said means comprising an upright deflection plat'eextending longitudinally of themtor and having'a hinging axis at its lower portion parallel-to the rotor axis to one side of the vertical plane "of the latter, and a substantially hori- "z'ontalshelfon the side of the plate remote from the rotor axis and having a hinged supporting engagementwith the plate on an axis parallel to the'rotor'axis,

-3. In-a reducing machine, a rotor, and means for removing unpulverable fragments from'the sphere of action'of the rotor and receiving such fragments, said means comprising an upright deflection plate extending longitudinally of the rotor andhaving a hinging axis at its lower portion parallel to the rotor axis to one side of the vertical plane of the latter, said plate being swingable about said axis away from the rotor to expose the latter, and a substantially horizontal displaceable shelf on the side of the plate remote from the rotor axis and having a supporting engagement with said plate along its edge adjacent thereto, and means engaging the opposite edge of the shelf to oppose displacement thereof in a direction away from the vertical plane of the rotor axis whereby the shelf serves as a compression member for maintaining the plate in operative position.

4. In a reducing machine, a rotor, and means for removing unpulverable fragments from the sphere of action of the rotor and receiving'such gagement with said plate along its edge adjacent thereto, and means engaging the opposite edge of the shelf to oppose displacement thereof in a direction away from the vertical plane of the rotor axis, said last-named means being disengageable to permit displacement of the shelf in the said direction.

5. In a reducing machine, a rotor, and means for removing unpulverab-le fragments from the sphere of action of the rotor and receiving such fragments, said means comprising an upright deflection plate extending longitudinally of the rotor and having a hinging axis at its lower portion parallel to the rotor axis to one side of the vertical plane of the latter, and a substantially horizontal shelf on the side of the plate remote from the rotor axis and having a supporting engagement with said plate along its edge adjacent thereto, and means engaging the opposite edge of the shelf to oppose displacement thereof in a direction away from the vertical plane of the rotor axis, said last-named means comprising a casing wall of the machine removable to permit displacement of the shelf in the said direction.

6. In a reducing machine, a rotor, and means for removing unpulverable fragments from the sphere of action of the rotor and receiving such fragments, said means comprising an upright deflection plate extending longitudinally of the rotor and having a hinging axis at its lower portion parallel to the rotor axis to one side of the vertical plane of the latter, and a substantially horizontal shelf on the side of the plate remote from the rotor axis and having a supporting engagement with said plate along its edge adjacent thereto, means engaging the opposite edge of the shelf to oppose displacement thereof in a direction away from the vertical plane of the rotor axis, and a rod supporting the edge of the shelf remote from the plate, said rod having its ends disengageably engaged in open-end horizontally disposed slots presented by structural elements of the machine.

7. In a reducing machine, a rotor, and means for removing unpulverable fragments from the sphere of action of the rotor and receiving such fragments, said means comprising collapsible members defining a side and bottom wall, respectively, of a trap, said bottom wall being pivoted at one side to said side wall on a horizontal axis and the side wall being pivotally supported at its lower portion on anaxis parallel to the first mentioned axis, and means releasably supporting a side of said bottom wall opposite the first mentioned side.

8. In a reducing machine, a rotor, and means for removing unpulverable fragments from the sphere of action of the rotor and receiving such fragments, said means comprising collapsible members defining a side and bottom wall, respectively, of a trap, said bottom wall being pivoted at one side to said side wall on a horizontal axis and the side wall being pivotally supported at its lower portion on an axis parallel to the first mentioned axis, and means releasably supporting a side of said bottom wall opposite the first mentioned side, said side wall being positioned relative to the rotor so that a surface of the side wall adjacent the rotor serves as a deflection surface for unpulverable fragments projected by the rotor.

9. In a rotary reducing machine, a rotor, means defining a feed opening above the rotor, an abutment slightly in advance of the feed opening adapted to intercept material projected tangentially from the rotor, and an. upright hinged deflection plate below the abutment with its top edge spaced from the latter, the upper portion of said plate constituting a wall portion of a pocket positioned to receive the intercepted fragments, said pocket having a bottom wall portion hingedly connected along one edge to the plate.

10. In a rotary reducing machine, a rotor, means defining a feed opening above the rotor, an abutment slightly in advance of the feed opening adapted to intercept mate-rial projected tangentially from the rotor, an upright hinged deflection plate below the abutment with its top edge spaced from the latter, the upper portion of said plate constituting a wall portion of a pocket positioned to receive the intercepted fragments, said pocket having a bottom wall portion hingedly connected along one edge to said plate and removable means supporting said wall portions against collapse, removal of said supporting means permitting collapse of said.- portions to expose the rotor.

11. In a rotary reducing machine, a rotor journaled on a horizontal axis, fixed means arranged around a portion or" the rotor periphery and defining therewith a reducing zone, a fixed deflection plate overlying the discharge end of said reducing zone, a pivoted deflection plate in continuation of said fixed means at the discharge end of said reducing zone and terminating short of said fixed deflection plate so that a discharge opening for unpulverable objects exists between the two plates, the pivoting axis of said plate being at the lower portion of the plate, means normally maintaining the pivoted plate in operative position, said last named means being releasable to permit said pivoted plate to swing away from the rotor to expose the latter, there.being a pocket for the discharged unpulverable fragments defined in part by said pivoted deflection plate, and

WALTER J ARMSTRONG. 

